Diminished triads are the drama queens of harmony: three notes stacked in minor thirds, permanently sounding like something bad is about to happen in a film noir. Left alone they just sit there being tense. The trick is getting from one to the next without your hand making a panicked leap across the fretboard — and that is exactly what this exercise refuses to let you avoid.
This clip is Exercise #28 from my voice leading series: diminished triads walking through the circle of fourths on the D, A and E strings, each chord connected to the next by moving the smallest possible distance. It is a focused drill for fretboard fluency and for finally making those spicy diminished shapes feel like home.
How diminished voice leading works
A diminished triad is a stack of two minor thirds — root, flat third, flat fifth — which is what gives it that unstable, wants-to-resolve character. "Voice leading" just means moving each of the three voices to the nearest note in the next chord instead of grabbing a whole new shape somewhere else on the neck. As you cycle through the circle of fourths, one note usually stays put or slides by a fret or two while the others shuffle around it. If you want the theory foundation, my lessons on triads and inversions and on voice leading unpack the mechanics; diminished chords also live right inside the harmonic minor key.
The concrete takeaway: before you play, look for the common tone or the closest note between each pair of chords, and let that note guide your hand. Practise it slowly on the D, A and E strings until the changes feel like walking, not jumping. That habit is the difference between chords that clunk and chords that flow.
Fair warning: once your ears get used to diminished triads, every other chord will start to sound suspiciously well-adjusted. Grab the PDF and Guitar Pro file on my Patreon and drill it until your fingers stop arguing.